Cap type rotary joint

Abstract

A cap type rotary joint comprises a core tube, an outer sleeve and a sealing assembly. One end of the core pipe is connected with the slag cooler, the outer sleeve sleeves the core pipe, and the sealing assembly is arranged between the outer sleeve and the core pipe. A water inlet is formed in the side wall of the outer sleeve; a water inlet cavity and a water outlet cavity are arranged in the core tube, and a water inlet hole in the side wall is opposite to the water inlet. The cap type rotary joint aims at solving the problems that an existing rotary joint is poor in sealing performance and difficult to maintain, and influences of axial movement and radial movement of a main shaft are difficult to overcome, the structural design of the cap type rotary joint reduces sealing difficulty through concentrated sealing, the maintenance process is simplified, adaptive adjustment can be conducted along with floating of the main shaft of the slag cooler, and the service life of the rotary joint is prolonged. The service life is prolonged. In addition, the device further comprises a limiting column, a stop assembly, a multi-stage sealing assembly, a water pressure sensor and other parts, and the sealing performance, stability and safety and reliability of the device are further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of cold slag machine especially relates to a cap type rotary joint for cold slag machine. BACKGROUND

[0002] In today's increasingly mature circulating fluidized bed boiler technology, the cold slag machine as the key equipment of the boiler bottom slag treatment system, its performance directly affects the stable operation and energy efficiency of the boiler. The main function of the cold slag machine is to cool and discharge the high-temperature bottom slag generated after the boiler combustion, and the rotary joint as the connecting component between the cold slag machine and the fixed pipeline, its role is to send the cooling water in the fixed pipeline into the cold slag machine, and discharge the cooling water after absorbing heat to the fixed pipeline.

[0003] However, the existing rotary joint has the following main problems in actual application: first, the sealing performance is poor, the traditional rotary joint adopts a single sealing structure, which is prone to sealing failure in the frequent rotating working environment, resulting in leakage of the cooling medium, which not only causes resource waste, but also may cause damage to the equipment, and even cause safety accidents; second, maintenance is difficult, the structure design of the traditional rotary joint is complex, and the disassembly and maintenance are difficult, once a fault occurs, long-time maintenance is often needed after shutdown, which seriously affects the production efficiency and equipment utilization; finally, it is difficult to overcome the influence of the axial movement and radial movement of the main rotating machine on the sealing and wear, during the operation of the cold slag machine, the main shaft will inevitably have axial movement and radial displacement due to manufacturing, process, installation, and thermal expansion and contraction and gravity deviation during load operation, and part of the rotary joint is fixed, and the other part is connected with the main shaft, resulting in uneven stress of the rotary joint, and thus reducing the sealing performance, aggravating the wear of the parts, and shortening the service life of the joint. SUMMARY

[0004] The utility model aims at at least in a certain extent solves one of the technical problems in the prior art.

[0005] Therefore, according to the embodiment of the present disclosure, a cap type rotary joint is provided, comprising:

[0006] The one end of the core pipe is used for connecting the cold slag machine;

[0007] The outer sleeve pipe is sleeved on the core pipe to rotate the core pipe in the outer sleeve pipe;

[0008] The sealing assembly is arranged between the inner wall of the outer sleeve pipe and the outer wall of the core pipe to seal the gap between the outer sleeve pipe and the core pipe;

[0009] The outer sleeve pipe side wall is provided with a water inlet, and the water inlet is used for connecting a water inlet pipe; the port of one end of the outer sleeve pipe is a water outlet, and the water outlet is used for connecting a water outlet pipe;

[0010] The core pipe is provided with a water inlet cavity and a water outlet cavity; a water inlet hole is formed in the side wall of the core pipe and penetrates the water inlet cavity, and the water inlet hole is arranged opposite to the water inlet; one end of the water inlet cavity away from the water outlet is penetrated by the core pipe; and the two ends of the water outlet cavity are penetrated by the two ends of the core pipe.

[0011] In the technical scheme, the hat-shaped structure is designed to integrate multiple missing points of the rotary joint at one place, and the sealing assembly is used for centralized sealing, which greatly reduces the sealing difficulty; the overall structure is simple, the outer sleeve can be detached from the core pipe during maintenance, the disassembly difficulty is small, and the maintenance efficiency is greatly improved; the rotary joint can float along with the axial movement and radial displacement of the main shaft of the slag granulator, so that the sealing failure and part wear caused by uneven force of the rotary joint are avoided, and the service life is prolonged.

[0012] In some embodiments, the core pipe comprises an inner pipe and an outer pipe, and the outer pipe is sleeved outside the inner pipe; the water inlet cavity is formed between the outer pipe and the inner pipe, and the water outlet cavity is arranged in the inner pipe;

[0013] The outer sleeve is divided into a first outer pipe body and a second outer pipe body; the inner diameter of the first outer pipe body is larger than that of the second outer pipe body; and the water outlet is arranged on the second outer pipe body;

[0014] The outer pipe is arranged in the first outer pipe body; one end of the inner pipe close to the water outlet protrudes from the inner pipe and extends into the second outer pipe body; the outer wall of the protruding end of the inner pipe is attached to the inner wall of the second outer pipe body, and a sealing ring is sleeved and arranged on the protruding end of the inner pipe;

[0015] The sealing assembly is arranged between the first outer pipe body and the outer pipe.

[0016] In the technical scheme, the double-layer structure of the inner pipe and the outer pipe is adopted, the water inlet cavity is formed between the outer pipe and the inner pipe, the flow path of the cooling water is optimized, on the other hand, the inner pipe is connected with the second outer pipe body of the outer sleeve to realize the rotary connection of the core pipe in the outer sleeve, and a zigzag gap is formed between the two, so that the sealing performance is improved.

[0017] In some embodiments, the technical scheme further comprises:

[0018] The limiting column is arranged on the foundation or the base of the slag granulator, and the limiting groove is arranged on the outer sleeve and arranged in the axial direction, and one end of the limiting column is arranged in the limiting groove.

[0019] In the technical scheme, the rotation of the outer sleeve is limited, and the outer sleeve can float along with the axial movement and radial displacement of the main shaft of the slag granulator through the radial and axial movement of the limiting column in the limiting groove, so that the sealing failure and part wear caused by uneven force of the rotary joint are avoided, and the service life is prolonged.

[0020] In some embodiments, further comprising a stop component; the stop component comprises:

[0021] A stop ring is sleeved outside the core pipe and fixedly connected with the core pipe;

[0022] A stop seat is sleeved outside the core pipe and located on the side of the stop seat away from the outer sleeve pipe;

[0023] A thrust bearing is sleeved outside the core pipe; one side of the thrust bearing is attached to the stop ring, and the other side is attached to the stop seat;

[0024] A fixed seat is fixedly arranged on the outer sleeve pipe;

[0025] A connecting screw rod is arranged; one end of the connecting screw rod is arranged to pass through the fixed seat in the direction close to the outer sleeve pipe and is threadedly connected with the outer limiting nut; the other end of the connecting screw rod is arranged to pass through the stop seat in the direction away from the outer sleeve pipe and is threadedly connected with the inner limiting nut.

[0026] In the technical scheme, the structure design ensures the rotation of the core pipe relative to the outer sleeve pipe and axially limits the outer sleeve pipe, so that the outer sleeve pipe can resist the impact of the drainage and is kept sleeved on the inner core.

[0027] In some embodiments, the sealing component comprises:

[0028] A first sealing member is sleeved outside the core pipe; the first sealing member comprises a first sealing sleeve and a second sealing sleeve; the first sealing sleeve and the second sealing sleeve are arranged at intervals in the axial direction to form an annular water permeable space between the first sealing sleeve and the second sealing sleeve; the water permeable space is opposite to the water inlet; a plurality of sealing rings are arranged on the core pipe and the first sealing sleeve and the second sealing sleeve of the first sealing member;

[0029] A second sealing member is sleeved outside the core pipe and located on the side of the first sealing member away from the water outlet; the second sealing member is a mechanical sealing device.

[0030] In the technical scheme, the structure design enables the first sealing member to preliminarily seal the cooling water, the second sealing member further enhances the sealing effect, forms multiple sealing guarantees, greatly reduces the possibility of cooling water leakage, and improves the safety and reliability of the equipment.

[0031] In some embodiments, an end of the first sealing member away from the water outlet is provided with a sealing flange surrounding the first sealing member.

[0032] In the technical scheme, the structure design can ensure the formation of a complex joint to block solid impurities in the cooling water from entering the second sealing member, thereby improving the service life of the second sealing member.

[0033] In some embodiments, the end face of the first sealing sleeve near the end of the second sealing sleeve is a tapered surface, and the end face of the second sealing sleeve near the end of the first sealing sleeve is a tapered surface, so that the width of the water permeable space gradually decreases in the direction close to the core tube.

[0034] In the technical scheme, the gradually decreasing space can accelerate the flow of the cooling water during the process of the cooling water flowing into the water inlet cavity through the water permeable space, so that the solid impurities in the cooling water can quickly enter the water inlet cavity along with the water flow, and the solid impurities are prevented from being left in the gap between the first sealing element and the outer sleeve tube or the gap between the first sealing element and the core tube, thereby preventing the first sealing element, the outer sleeve tube and the core tube from being worn.

[0035] In some embodiments, the sealing assembly further comprises:

[0036] The third sealing element is sleeved on the core tube and located on the side of the second sealing element away from the water outlet; the third sealing element is a carbon fiber packing.

[0037] In the technical scheme, the structure design further increases the sealing structure to form multiple sealing guarantees, greatly reduces the possibility of cooling water leakage, and improves the safety and reliability of the equipment; on the other hand, the third sealing element has good wear resistance, high temperature resistance and elasticity, can effectively fill the small gap between the core tube and the outer sleeve tube, further improves the sealing performance, and prevents the cooling water from leaking.

[0038] In some embodiments, the core tube is provided with a retaining ring surrounding the core tube; the retaining ring comprises a first retaining ring and a second retaining ring, the first retaining ring is located between the first sealing element and the second sealing element, and the second retaining ring is located between the second sealing element and the third sealing element.

[0039] In the technical scheme, the structure design can separate and support each sealing element in the sealing assembly, reasonably distribute the sealing pressure, prevent the sealing elements from being extruded or worn, and ensure that each sealing element can normally play a role; on the other hand, the structure of the sealing assembly is more stable, can better adapt to various forces generated during the rotation of the core tube, improves the overall performance and reliability of the sealing assembly, and further enhances the sealing effect of the rotary joint.

[0040] In some embodiments, the sealing assembly further comprises:

[0041] The water pressure sensor is arranged in the detection hole provided on the outer sleeve tube and closes the detection hole; the detection hole is opposite to the sealing assembly, and the water pressure sensor is electrically connected to the detector to measure the water pressure of the space where the sealing assembly is located.

[0042] In the technical scheme, the structure design can monitor water pressure of a space where the sealing assembly is located in real time, and transmit a signal of the water pressure to a detector, so that an operator can discover whether the sealing assembly leaks or has other abnormal conditions in time according to the change of the water pressure, and take corresponding measures for processing, thereby improving safety and reliability of the equipment; on the other hand, the detection hole can be opened by dismounting the water pressure sensor, and dead water is discharged regularly, so that corrosion of the sealing assembly is avoided, and service life of the sealing assembly is prolonged.

[0043] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0045] Figure 1 It is a structural schematic view of the cap type rotary joint of the present application;

[0046] Figure 2 It is a sectional view of the cap type rotary joint of the present application;

[0047] Figure 3 It is a sectional view of the cap type rotary joint of the present application; Figure 2

[0048] In the drawings:

[0049] 1, core pipe; 101, water inlet cavity; 102, water outlet cavity; 103, water inlet hole; 104, inner pipe; 105, outer pipe; 106, end ring; 107, connecting flange;

[0050] 2, outer sleeve; 201, water inlet; 202, water outlet; 203, first outer pipe body; 204, second outer pipe body; 205, limiting groove; 206, detection hole;

[0051] 3, sealing assembly; 301, first sealing element; 3011, water permeable space; 3012, sealing flange; 3013, first sealing sleeve; 3014, second sealing sleeve; 302, second sealing element; 303, third sealing element; 304, first check ring; 305, second check ring;

[0052] 4, water inlet pipe; 5, water outlet pipe; 6, sealing ring; 7, limiting column;

[0053] ​8, stop assembly; 801, stop ring; 802, stop seat; 803, thrust bearing; 804, fixed seat; 805, connecting screw; 806, outer limit nut; 807, inner limit nut;

[0054] 9, plug; 10, water pressure sensor. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0056] In the description of the present application, it should be understood that the terms "center", "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0057] The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features.

[0058] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] As shown in FIG. 1, in one illustrative embodiment of the cap-type rotary joint of the present application, the cap-type rotary joint includes a core tube 1, an outer sleeve 2, and a sealing assembly 3. Figures 1 to 3

[0060] ​The cold slag machine has a barrel, which adopts a water-cooled wall structure and has a water channel inside to pass in cooling water. The high-temperature bottom slag sent into the barrel is stirred and turned over with the rotation of the barrel, fully contacts with the inner wall of the barrel, so that the cooling water takes away the heat and cools the high-temperature bottom slag. The barrel is installed on the base of the cold slag machine through the main shaft arranged at both ends to realize the rotation of the barrel.

[0061] One end of the core pipe 1 is fixedly connected to the main shaft of the barrel of the cold slag machine, so that the core pipe 1 rotates coaxially with the main shaft. The outer sleeve pipe 2 is sleeved on the core pipe 1 to make the core pipe 1 rotate in the outer sleeve pipe 2. The sealing assembly 3 is arranged between the inner wall of the outer sleeve pipe 2 and the outer wall of the core pipe 1, that is, the outer side surface and the inner side surface of the sealing assembly 3 are respectively attached to the inner wall of the outer sleeve pipe 2 and the outer wall of the core pipe 1 to seal the gap between the outer sleeve pipe 2 and the core pipe.

[0062] The side wall of the outer sleeve pipe 2 is provided with a water inlet 201, and the water inlet 201 is connected to a water inlet pipe 4. The port of one end of the outer sleeve pipe 2 is a water outlet 202, and the water outlet 202 is connected to a water outlet pipe 5. The water inlet pipe 4 and the water outlet pipe 5 are both fixed outside the rotary joint, and the outer sleeve pipe 2 is connected to the water inlet pipe 4 and the water outlet pipe 5 to limit the outer sleeve pipe 2, so that the water inlet pipe 4 and the water outlet pipe 5 prevent the outer sleeve pipe 2 from rotating with the core pipe 1, and ensure the rotation of the core pipe 1 relative to the outer sleeve pipe 2.

[0063] The core pipe 1 is provided with a water inlet cavity 101 and a water outlet cavity 102. The side wall of the core pipe 1 is provided with a water inlet hole 103, and the water inlet hole 103 penetrates the water inlet cavity 101 and is arranged opposite to the water inlet 201. One end of the water inlet cavity 101 away from the water outlet 202 penetrates the core pipe 1. The two ends of the water outlet cavity 102 penetrate the two ends of the core pipe 1 respectively. The core pipe 1 is inserted into the outer sleeve pipe 2 from one end of the outer sleeve pipe 2, so that the port of one end of the water outlet cavity 102 of the core pipe 1 is connected to the water outlet 202 of the other end of the outer sleeve pipe 2.

[0064] The inlet and outlet of the water channel of the barrel are located on the end face of the main shaft, and one end of the core pipe 1 is fixedly connected to the main shaft, so that the water inlet cavity 101 is connected to the inlet of the water channel and one end of the water outlet cavity 102 is connected to the outlet of the water channel at the end of the core pipe 1. The water inlet pipe 4 sends cooling water into the outer sleeve pipe 2 through the water inlet 201, and then the cooling water enters the water inlet cavity 101 through the water inlet hole 103, so as to be sent into the inlet of the water channel of the barrel; the cooling water is discharged from the outlet of the water channel of the barrel into the water outlet cavity 102, and then is transported to the water outlet 202 on the outer sleeve pipe 2 by the water outlet cavity 102, and finally is discharged by the water outlet pipe 5.

[0065] The structure design makes the outer sleeve pipe 2 sleeved on the core pipe 1 to form a cap structure, the outer sleeve pipe 2 covers the core pipe 1 as a cap structure, only the gap between the outer sleeve pipe 2 and the core pipe 1 needs to be sealed, and the sealing assembly 3 is used to seal the gap, which reduces the sealing difficulty.

[0066] The rotary joint structure is simple, the core pipe 1 can be installed from the port at one end of the outer sleeve pipe 2, the core pipe 1 can be removed through the port at the end of the outer sleeve pipe 2, and the sealing assembly 3 can also be taken out from the outer sleeve pipe 2, so that the difficulty of disassembly during maintenance is small, and the maintenance efficiency is greatly improved.

[0067] The core pipe 1 is fixedly connected with the main shaft of the slag cooler, so as to float axially and radially along with the axial movement and radial displacement of the main shaft. The outer sleeve pipe 2 sleeved on the core pipe 1 can float synchronously with the core pipe 1, and the core pipe 1 and the outer sleeve pipe 2 will not produce relative displacement due to the floating of the main shaft, so as to avoid the wear of the core pipe 1, the outer sleeve pipe 2 and the sealing assembly 3 caused by the relative displacement of the core pipe 1 and the outer sleeve pipe 2, maintain the structural stability of the sealing assembly 3, maintain the sealing effect, and prolong the service life. In order to avoid the limitation of the water inlet pipe 4 and the water outlet pipe 5 on the floating of the outer sleeve pipe 2, the water inlet pipe 4 and the water outlet pipe 5 are made of soft pipe material.

[0068] In the present application, the core pipe 1 includes an inner pipe 104 and an outer pipe 105, and the outer pipe 105 is sleeved outside the inner pipe 104. The space between the outer pipe 105 and the inner pipe 104 is formed as a water inlet cavity 101, that is, the cylindrical space between the outer pipe 105 and the inner pipe 104 is used as the water inlet cavity 101. The water outlet cavity 102 is arranged in the inner pipe 104, that is, the internal space of the inner pipe 104 is used as the water outlet cavity 102, and the ports at both ends of the inner pipe 104 are used as the openings at both ends of the water outlet cavity 102.

[0069] In order to support the inner pipe 104 and avoid the contact between the inner pipe 104 and the outer pipe 105, the cylindrical space between the two is maintained, the core pipe 1 has an end ring 106 and a connecting flange 107 at both ends respectively. The end ring 106 is arranged in the outer pipe 105 and sleeved outside the inner pipe 104. The outer side edge of the end ring 106 is fixedly connected with the inner wall of the outer pipe 105, and the inner side edge of the end ring 106 is fixedly connected with the outer wall of the inner pipe 104, so as to close one end of the cylindrical space. The other end of the inner pipe 104 and the outer pipe 105 is fixed on the connecting flange 107, and the connecting flange 107 is fixedly connected with the main shaft of the slag cooler. Since the water inlet cavity 101 needs to be connected with the inlet of the water channel on the core pipe 1 and the main shaft, a water passing channel is arranged on the connecting flange 107, so that the cooling liquid in the water inlet cavity 101 can be discharged and fed into the slag cooler.

[0070] The outer sleeve pipe 2 is divided into a first outer pipe body 203 and a second outer pipe body 204. One end of the first outer pipe body 203 is fixedly connected with one end of the second outer pipe body 204. The inner diameter of the first outer pipe body 203 is larger than the inner diameter of the second outer pipe body 204. The water outlet 202 is arranged on the second outer pipe body 204.

[0071] The outer tube 105 is arranged in the first outer tube body 203. The inner tube 104 protrudes from the inner tube 104 at one end close to the water outlet 202 and extends into the second outer tube body 204. The part of the inner tube 104 protruding from the outer tube 105 has its outer wall attached to the inner wall of the second outer tube body 204, and a sealing ring 6 is arranged on the part.

[0072] The structure design makes the core tube 1 adopt a double-layer structure of the inner tube 104 and the outer tube 105, and the water inlet cavity 101 is formed between the outer tube 105 and the inner tube 104. This design optimizes the flow path of the cooling water, fully utilizes the structural space of the core tube 1, and enables the cooling water to flow smoothly into the main shaft in the axial direction.

[0073] The outer wall of the protruding part of the inner tube 104 is in sliding fit with the inner wall of the second outer tube body 204, so that the part of the inner tube 104 at one end is rotatably mounted in the second outer tube body 204 of the outer sleeve tube 2, and the inner tube 104 is rotatably mounted in the outer sleeve tube 2.

[0074] The core tube 1 adopts the inner tube 104 and the outer tube 105, so that the water inlet hole 103 is located on the outer tube 105. Since the water inlet hole 103 is opposite to the water inlet 201, the water inlet 201 is arranged on the first outer tube body 203. The cooling water entering the outer sleeve tube 2 through the water inlet 201 is located in the first outer tube body 203. The difference in the inner diameters of the first outer tube body 203 and the second outer tube body 204 forms a stepped structure therebetween, thereby forming a bent gap between the outer sleeve tube 2 and the core tube 1, so that the cooling water is difficult to flow to the second outer tube body 204 in the direction of the water outlet 202, and the sealing ring 6 mounted on the protruding part of the inner tube 104 seals the gap between the inner tube 104 and the second outer tube body 204, thereby ensuring the sealing performance of the rotating fit part of the outer sleeve tube 2 and the core tube 1. The sealing assembly 3 seals the gap between the first outer tube body 203 and the outer tube 105, thereby preventing the cooling water from flowing away from the water outlet 202, and ensuring the sealing performance of the other end.

[0075] In the present application, the cap-type rotary joint further comprises a limiting column 7. The limiting column 7 is fixed on the ground or the base of the slag granulator, so that it is fixedly mounted. A limiting groove 205 is arranged on the outer sleeve tube 2, and the limiting groove 205 is arranged in the axial direction. One end of the limiting column 7 is arranged in the limiting groove 205.

[0076] The water inlet pipe 4 and the water outlet pipe 5 are both connected to fixed pipes. When the water inlet pipe 4 and the water outlet pipe 5 are made of soft pipe materials, if the outer sleeve tube 2 is pulled by the water inlet pipe 4 and the water outlet pipe 5 to prevent it from rotating, the water inlet pipe 4 and the water outlet pipe 5 will bear a large torque. Although the cooling water filled in the water inlet pipe 4 and the water outlet pipe 5 can make them have rigidity to a certain extent, the water inlet pipe 4 and the water outlet pipe 5 are still prone to twisting or even breaking due to bearing a large torque, which may cause the waterway to be interrupted or the pipe material to be damaged.

[0077] The structure design makes the limiting column 7 prevent the outer sleeve 2 from rotating by cooperating with the limiting groove 205, avoids the water inlet pipe 4 and the water outlet pipe 5 from bearing a large torque, and guarantees the service life of the water inlet pipe 4 and the water outlet pipe 5. On the other hand, since the limiting groove 205 is arranged axially, when the outer sleeve 2 floats radially or axially along with the main shaft of the slag granulator, the limiting column 7 can move axially or radially in the limiting groove 205, avoids the sealing failure and the part wear caused by the uneven force of the rotary joint, and prolongs the service life.

[0078] In the present application, the cap rotary joint further comprises a stop component 8. The stop component 8 comprises a stop ring 801, a stop seat 802, a thrust bearing 803, a fixed seat 804 and a connecting screw 805. The stop ring 801 is sleeved outside the core pipe 1 and is fixedly connected with the core pipe 1. The stop seat 802 is sleeved outside the core pipe 1 and is located on the side of the stop seat 802 away from the outer sleeve 2. The thrust bearing 803 is sleeved outside the core pipe 1. One side of the thrust bearing 803 is attached to the stop ring 801, and the other side is attached to the stop seat 802. The fixed seat 804 is fixedly arranged on the outer sleeve 2. One end of the connecting screw 805 is arranged to pass through the fixed seat 804 in the direction close to the outer sleeve 2, and is threadedly connected with an outer limiting nut 806. The other end of the connecting screw 805 is arranged to pass through the stop seat 802 in the direction away from the outer sleeve 2, and is threadedly connected with an inner limiting nut 807.

[0079] The cooling water discharged by the slag granulator enters the water outlet cavity 102 in the core pipe 1, then flows into the outer sleeve 2 and is output to the water outlet pipe 5 through the water outlet 202. The flow of the cooling water to the water outlet 202 forms an impact on the outer sleeve 2, generates an action force pushing the outer sleeve 2 away from the main shaft, makes the outer sleeve 2 pull out from the core pipe 1 under the action force, and causes the assembly connection between the outer sleeve 2 and the core pipe 1 to be disassembled.

[0080] The structure design makes the core pipe 1 fixedly connected with the main shaft prevent the stop seat 802 from moving axially away from the main shaft through the stop ring 801 and the thrust bearing 803. Further, the stop seat 802 pulls the fixed seat 804 through the connecting screw 805, prevents the outer sleeve 2 from moving axially away from the main shaft, resists the action force generated by the water outlet, keeps the relative position between the outer sleeve 2 and the core pipe 1 stable in the axial direction, and avoids the rotary structure from being disassembled under the action of the water flow. In addition, since the outer sleeve 2 does not rotate and the core pipe 1 rotates, the stop seat 802 needs to not rotate and the stop ring 801 needs to rotate. The thrust bearing 803 is arranged between the stop ring 801 and the stop seat 802, ensures the smooth relative rotation between the two, and guarantees the stable limiting effect.

[0081] In the present application, the stop seat 802 further sheaths the outer side of the thrust bearing 803, so that the stop seat 802 serves as a bearing sleeve to sheath the thrust bearing 803. The structure design makes the stop seat 802 sheath the thrust bearing 803, so that the thrust bearing 803 is in a closed space, avoiding the external impurities from entering the thrust bearing 803 to cause its abrasion, and improving the service life of the thrust bearing 803.

[0082] In the present application, the sealing assembly 3 comprises a first sealing member 301 and a second sealing member 302.

[0083] The first sealing member 301 sheaths the outer side of the core pipe 1, so that the outer wall and the inner wall of the first sealing member 301 are attached to the inner wall of the sleeve pipe 2 and the outer wall of the core pipe 1 respectively, and the space between the sleeve pipe 2 and the core pipe 1 at the corresponding position is completely filled, so as to seal the space. The first sealing member 301 comprises a first sealing sleeve 3013 and a second sealing sleeve 3014, and the first sealing sleeve 3013 and the second sealing sleeve 3014 are arranged at intervals in the axial direction, so that the structure of the first sealing member 301 is divided into two sections. The first sealing sleeve 3013 and the second sealing sleeve 3014 form a ring-shaped water permeable space 3011, one side of which is opposite to the water inlet 201, and the other side of which is opposite to the water inlet hole 103. The cooling water entering the sleeve pipe 2 through the water inlet 201 can pass through the first sealing member 301 through the water permeable space 3011, and then enter the water inlet cavity 101 of the core pipe 1 through the water inlet hole 103. The water inlet hole 103 can also keep the cooling water continuously flowing into the water inlet cavity 101 as the core pipe 1 rotates. A plurality of sealing rings 6 are installed on the first sealing sleeve and the second sealing sleeve of the core pipe 1 and the first sealing member 301, so that the sealing rings 6 sheathed on the core pipe 1 are in contact with the inner wall of the first sealing member 301, and the sealing rings 6 sheathed on the first sealing member 301 are in contact with the inner wall of the sleeve pipe 2.

[0084] The second sealing member 302 sheaths the outer side of the core pipe 1 to seal the space between the sleeve pipe 2 and the core pipe 1 at the corresponding position. The second sealing member 302 is located on the side away from the water outlet 202 of the first sealing member 301, so that the first sealing member 301 and the second sealing member 302 are arranged in sequence in the axial direction towards the direction of the main shaft of the slag cooler.

[0085] The structure design makes the first sealing member 301 capable of preliminarily sealing the cooling water, and the second sealing member 302 further enhances the sealing effect to form multiple sealing protections, greatly reducing the possibility of cooling water leakage and improving the safety and reliability of the equipment.

[0086] The first seal 301 can be made of polytetrafluoroethylene or bronze graphite sleeve. After the core tube 1 rotates in the outer sleeve 2 for a period of time, the outer wall and / or the inner wall of the first seal 301 is worn, and the cooling water flows along the outer wall and / or the inner wall of the first seal 301 to the space where the second seal 302 is located, so that the second seal 302 generates a sealing effect under the action of water pressure. The structure design delays the time when the second seal 302 starts to seal, thereby prolonging the service life thereof. The sealing ring 6 sleeved with the core tube 1 and the first seal 301 can block the fine solid impurities (hard particles, rust residues, scale hard residues, etc.) in the cooling water, so as to prevent the fine solid impurities from entering the space where the second seal 302 is located, prevent the second seal 302 from being blocked or worn due to this, and further prolong the service life thereof.

[0087] In the present application, the end of the first seal 301 away from the water outlet 202 is provided with a sealing flange 3012 surrounding the first seal 301.

[0088] The structure design makes the sealing flange 3012 form a stop edge, and the inner wall of the outer sleeve 2 needs to cooperate with the stop edge, so as to form a bent gap between the inner wall of the outer sleeve 2 and the sealing flange 3012, increase the difficulty of seepage of the cooling water to the second seal 302, block the solid impurities in the cooling water from entering the second seal 302, reduce the sealing pressure of the second seal 302, and improve the service life of the second seal 302.

[0089] In the present application, the end face of the first seal sleeve 3013 close to the second seal sleeve 3014 is a tapered surface, and the end face of the second seal sleeve 3014 close to the first seal sleeve 3013 is a tapered surface, that is, the two end faces opposite to each other between the first seal sleeve 3013 and the second seal sleeve 3014 are tapered surfaces, and the width of the water permeable space 3011 gradually decreases in the direction close to the core tube 1. The structure design makes the space where the cooling water flows from the water inlet 201 to the water inlet hole 103 through the water permeable space 3011 gradually decrease, so as to realize the acceleration effect on the flow of the cooling water, and the solid impurities in the cooling water can quickly pass through the water inlet hole 103 into the water inlet cavity 101 along with the high-speed flow of the cooling water, so as to avoid that the low flow rate of the cooling water causes the solid impurities to stay in the water permeable space, thereby reducing the risk that the solid impurities enter the gap between the first seal 301 and the outer sleeve 2 or the gap between the first seal 301 and the core tube 1, and further preventing the first seal 301, the outer sleeve 2 and the core tube 1 from being worn, thereby improving the service life of the equipment.

[0090] In the present application, the sealing assembly 3 further comprises a third seal 303. The third seal 303 is sleeved outside the core pipe 1 and located on the side of the second seal 302 away from the water outlet 202, so that the first seal 301, the second seal 302 and the third seal 303 are sequentially arranged in the direction of approaching the main shaft of the slag cooler in the axial direction. The third seal 303 is a carbon fiber packing.

[0091] The structural design further increases a sealing structure, forms multiple sealing to ensure safety, greatly reduces the possibility of cooling water leakage, and improves the safety and reliability of the equipment. On the other hand, the third seal 303 adopts carbon fiber packing, which has good wear resistance, high temperature resistance and elasticity, and can effectively fill the small gap between the core pipe 1 and the outer sleeve pipe 2, further improve the sealing performance, and prevent cooling water leakage.

[0092] In the present application, the core pipe 1 is provided with a retaining ring which surrounds the core pipe 1. The retaining ring comprises a first retaining ring 304 and a second retaining ring 305. The first retaining ring 304 is located between the first seal 301 and the second seal 302, and the second retaining ring 305 is located between the second seal 302 and the third seal 303.

[0093] The structural design can separate and support each seal in the sealing assembly 3, reasonably distribute the sealing pressure, prevent mutual extrusion or wear between the seals, and ensure that each seal can function normally. On the other hand, the axial support of the retaining ring makes the structure of the sealing assembly 3 more stable, which can better adapt to various forces generated during the rotation of the core pipe 1, improve the overall performance and reliability of the sealing assembly 3, and further enhance the sealing effect of the rotary joint.

[0094] In the present application, the cap-type rotary joint further comprises a plug 9. The plug 9 is sleeved outside the core pipe 1 and is installed on the end of the outer sleeve pipe 2 away from the water outlet 202 by bolts, so as to close one end of the cylindrical space between the outer sleeve pipe 2 and the core pipe 1. Further, the plug 9 is attached to the sealing assembly 3 in the direction of approaching the water outlet 202, so as to form axial limiting for the sealing assembly 3 and improve the stability of the sealing assembly 1 installed between the outer sleeve pipe 2 and the core pipe 1.

[0095] The structural design can seal the sealing assembly 3 in the sealed space, prevent foreign matter from entering the inside of the sealing assembly 3, improve the safety and stability of the sealing assembly 3, and prolong the service life. In addition, the sealing of the plug 9 can prevent cooling water from leaking from the end of the sealing assembly 3 to a certain extent, and improve the sealing effect.

[0096] In the application, the cap type rotary joint further comprises a water pressure sensor 10. A detection hole 206 is arranged on the outer sleeve 2, the water pressure sensor 10 is arranged in the detection hole 206 and seals the detection hole 206, so as to avoid the leakage of cooling water through the detection hole 206, and meanwhile enables the water pressure sensor 10 to contact the cooling water in the outer sleeve 2 and detect the water pressure of the cooling water.

[0097] The detection hole 206 is opposite to the sealing assembly 3, so that the water pressure detected by the water pressure sensor 10 is the water pressure of the cooling water in the space where the sealing assembly 3 is located. The water pressure sensor 10 is electrically connected to a detector through a wire, and the detector obtains the water pressure in the space where the sealing assembly 3 is located through the water pressure sensor 10. When the water pressure data remains unchanged, it indicates that the space where the sealing assembly 3 is located has no water leakage and the sealing effect is stable; when the water pressure data decreases, it indicates that the space where the sealing assembly 3 is located may have water leakage. When the water pressure sensor 10 corresponds to the second sealing member 302 and the water pressure increases, it indicates that the first sealing member 301 may be damaged and needs to be repaired.

[0098] The structure design can monitor the water pressure in the space where the sealing assembly 3 is located in real time, and transmit the signal to the detector. The operator can discover whether the sealing assembly 3 has leakage or other abnormal conditions in time according to the change of the water pressure, so as to take corresponding measures for processing, thereby improving the safety and reliability of the equipment. In addition, the water pressure sensor 10 can be installed on the detection hole 206 through a detachable connection mode such as screw connection, so as to detach the water pressure sensor 10 from the detection hole 206 when needed, open the detection hole 206, and discharge the dead water in the space where the sealing assembly 3 is located for a long time, so as to avoid the deterioration of the dead water for a long time and further corrode the sealing assembly 3, thereby prolonging the service life of the sealing assembly 3.

[0099] Finally, it should be noted that: the embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0100] The above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application claimed.

Claims

1. A cap-type rotary joint, characterized in that, The utility model relates to a water cooling device for a slag granulator, comprising: a core pipe having one end connected to the slag granulator; an outer sleeve pipe sleeved on the core pipe to allow the core pipe to rotate in the outer sleeve pipe; a sealing assembly arranged between the inner wall of the outer sleeve pipe and the outer wall of the core pipe to seal the gap between the outer sleeve pipe and the core pipe; the outer sleeve pipe has a water inlet opening on its side wall for connecting a water inlet pipe; and the core pipe has a water inlet cavity and a water outlet cavity; the side wall of the core pipe has a water inlet hole penetrating the water inlet cavity, which is arranged opposite to the water inlet opening; one end of the water inlet cavity away from the water outlet opening penetrates the core pipe; and both ends of the water outlet cavity penetrate both ends of the core pipe.

2. The rotary union of claim 1, wherein, The core pipe comprises an inner pipe and an outer pipe, the outer pipe is sleeved on the inner pipe, the water inlet cavity is formed between the outer pipe and the inner pipe, and the water outlet cavity is arranged in the inner pipe; the outer sleeve pipe is divided into a first outer pipe body and a second outer pipe body; the inner diameter of the first outer pipe body is larger than that of the second outer pipe body; and the water outlet opening is arranged on the second outer pipe body; the outer pipe is arranged in the first outer pipe body; one end of the inner pipe close to the water outlet opening protrudes from the inner pipe and extends into the second outer pipe body; the outer wall of the protruding end of the inner pipe is attached to the inner wall of the second outer pipe body, and a sealing ring is sleeved and arranged on the protruding end of the inner pipe; the sealing assembly is arranged between the first outer pipe body and the outer pipe.

3. The rotary union of claim 1, wherein, Further comprising: a limiting column fixed on the foundation or the base of the slag granulator; the outer sleeve pipe is provided with a limiting groove arranged in the axial direction, and one end of the limiting column is arranged in the limiting groove.

4. The rotary union of claim 1 or 3, wherein, Further comprising a stopper assembly, which comprises: a stop ring sleeved on the core pipe and fixedly connected with the core pipe; a stop seat sleeved on the core pipe and located on the side of the stop seat away from the outer sleeve pipe; a thrust bearing sleeved on the core pipe; one side of the thrust bearing is attached to the stop ring, and the other side is attached to the stop seat; a fixed seat fixedly arranged on the outer sleeve pipe; a connecting screw rod, one end of which is screwed with an outer limiting nut after penetrating the fixed seat towards the outer sleeve pipe; the other end of the connecting screw rod is screwed with an inner limiting nut after penetrating the stop seat away from the outer sleeve pipe.

5. The rotary union of claim 1, wherein, The sealing assembly comprises: a first sealing member sleeved on the core pipe; the first sealing member comprises a first sealing sleeve and a second sealing sleeve, which are arranged in the axial direction and spaced apart to form an annular water permeable space between the first sealing sleeve and the second sealing sleeve; the water permeable space is opposite to the water inlet opening; a plurality of sealing rings are sleeved and arranged on the core pipe, the first sealing sleeve and the second sealing sleeve of the first sealing member; a second sealing member sleeved on the core pipe and located on the side of the first sealing member away from the water outlet opening; the second sealing member is a mechanical sealing device.

6. The rotary union of claim 5, wherein, The first sealing member is provided with a sealing flange at one end away from the water outlet, and the sealing flange surrounds the first sealing member.

7. The rotary union of claim 5, wherein, The end face of the first sealing sleeve near the second sealing sleeve is a tapered surface, and the end face of the second sealing sleeve near the first sealing sleeve is a tapered surface, so that the width of the water permeable space gradually decreases along the direction close to the core pipe.

8. The rotary union of claim 5, wherein, The sealing assembly further comprises: A third sealing member is sleeved on the core pipe and located on the side of the second sealing member away from the water outlet; the third sealing member is a carbon fiber packing.

9. The rotary union of claim 8, wherein, The core pipe is provided with a stop ring surrounding the core pipe; the stop ring comprises a first stop ring and a second stop ring, the first stop ring is located between the first sealing member and the second sealing member, and the second stop ring is located between the second sealing member and the third sealing member.

10. The rotary union of claim 1, wherein, Further comprising: A water pressure sensor is arranged in a detection hole provided on the outer sleeve and closes the detection hole; The detection hole is opposite to the sealing assembly, and the water pressure sensor is used for electrically connecting the detector to measure the water pressure of the space where the sealing assembly is located.

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